Prank g



(No Model.)

I'. C. SOPER. ORNAMENTAL PRISM LIGHT.

No. 595,270. Patented Deo.7,189'7.

UNITED STATES PATnNT Ormes.

FRANK C. SOPER, OF CHICAGO, ILLINOIS, ASSIGNOR T TIIF. LUXFER PRISM PATENTS COMPANY, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 595,270, dated December 7, 1897. Application led September 7. 1897. Serial No. 650,700. (No model.)

To @ZZ wiz/0m it may concern: ltion of the design maybe formed on any given Be it known that I, FRANK C. SOPER, a citiprism-light, if desired, the entire design be zen of the United States, residing at Chicago, ing produced only when the prism-lights are in the county of Cook and State of Illinois, bound together. The prisms in this case are 5 have invented certain new and useful Imsystematically arranged so as to produce an 55 provements in Ornamental Prism-Lights, of increased illuminating elfect when they are which the following is a specification. placed in the aperture through which the My invention relates to prism-lights, and light is admitted, and the prisms may be of has for its object to provide a new and imdifferent sizes.

IO proved prism-light, of which the following is I have spoken of designs, though, ofcourse, 6o a description, reference being had to the ac- I do not mean this to be an application for a companying drawings, whereinpatent on a design. It is only that in order Figure l is a view of a prism-light embodyto avail oneself of my improvement it is necing my invention. Fig. 2 is a section on line essary to form some hind of a design that 15 2 2, Fig. l. Fig. 3 is aview showing a modi- I have spoken of this. matter and called at- 65 fied form of design. Fig. l is a section on tention to the fact that ornamental designs ,line 4 a, Fig. 3. Fig. 5 shows a further modimay thus be produced. The essential feafied design. Fig. (5 is a section on line 6 (3, ture of the invention as shown in the drawy Fig. 5. ings is the fact that the prisms are shaped 2o Like letters refer to like parts throughout so that while all run in the same direction 7o the several figures. across the plate and all cooperate and are As illustrated in Fig. l, I have shown a systematically arranged to produce an inprism-light A, formed of a single piece oi' macreased illuminating effect, still the ends of ferial and provided with the prisms B and C. the prisms of the various groups do not rege 5 The prisms C are smaller and are separated ister, so to speak, and therefore the long, 75 by smaller spaces than the prisms B and are continuous, and uniform prisms which charsystematically arranged so as to produce a acterize other prism-lights are not to be found design on the prism-light as shown. in this construction. This result is best ac- In Figs. 3 to 6 I have shown simple designs complished by the prisms of different sizes,

3o differing from the design shown in Fig. l. In as indicated; but the line of demarcation be- 8o all these figures it will be noted that the detween the two groups of prisms is produced sign is formed on a prism-light wherein the not by their different sizes, but by the fact prisms are'all integral with the light, so that that their edges or ends do not register and there is only a single piece, the design being do not, therefore, produce a complete or con 3 5 due to prisms of various sizes. tinuous prism clear across the plate. Many 8 5 I have only attempted to show simple dedefects in the prisms themselves and many signs to which my invention is applied, so difficultiesin their manufacturehave resulted that its application may be readily underfrom these long` prisms, and it has been diflistood, and itis of course evident that designs cult to overcome such troubles, and this is 4o of anysuitable description may be formed in one of the means whereby it can be done and 9o this manner upon the prism-lights, the prisms whereby the irregularities and imperfections being` utilized to distribute the light or direct in the prism side may be minimized or renit in any desired direction. The prism-lights dered less evidentor obvious to the observer. may be molded or rolled or formed in any I claim A 45 desired manner, and I do not limit myself in l. Aprisnrlight comprising a substantially 95 any manner to the description herewith preflat and comparatively thin body of transparsented. ent material provided with series of prisms Theprismdights formedin accordance with running parallel to each other and all ar my invention may be combined into a prism ranged systematically to produce anincreased 5c plate in the ordinary manner and only a porilluminating effect, the series of prisms ar- 10o 1o ranged in groups so that the ends of the prisms of one group abut against but do not register with the ends of the prisms of another group, and the prisms of one series being smaller or the grooves between them shallower than the prisms and grooves of another group.

FRANK C. SUPER.

Witnesses:

DONALD M. CARTER, BERTHA C. Sms. 

